Matt_E Roundnose Rebuild Thread - Motor Update for 2009

[Matt_E]

Spokane River by Post Falls, ID

 

[Matt_E]

Another update.
I am finally back to a stock waterbox. I am very relieved about that.
Ski sounds almost stock now and isn't a pain in the ass to everyone else within 3 miles.
No loss in power.

I also have a brand-new steering cable on it.
I now have about 65 gallons through the motor.

 

[Motorheads5]

I am lookin for an after market waterbox .

 

[Matt_E]

Unless you like really loud noises and don't mind pissing people off, don't do it.

 

[Motorheads5]

Well fact of the matter is it's just us no one else to listen to anything , How much do you want for it ?

 

[Matt_E]

It's been gone for almost a month, sorry.
I had worked out a trade against the stocker.

 

[Motorheads5]

Gotchya well thank's anyway glad your ski is running good for you.

 

[Matt_E]

It is, thank you.

 

[suva]

Another update.
I am finally back to a stock waterbox. I am very relieved about that.
Ski sounds almost stock now and isn't a pain in the ass to everyone else within 3 miles.
No loss in power.

I also have a brand-new steering cable on it.
I now have about 65 gallons through the motor.

Whew! My ears will thank you. I'm considering an SXR box on my square after sitting on the beach listening to my buddy riding it.

 

[Matt_E]

Update.

The engine got busted at Surf Slam. One of the rod big end bearings came apart and took out a sleeve.
I sent the top end and crank back to Art and had him rebuild the crank (Crankworks, actually)
Sucks, the crank was the only really "used" part in the engine build last year.
It was sold to me as a freshly rebuilt OEM crank, but some doubts have been cast on that.
Anyhow, got a shiny new crank now, I know who rebuilt it, and it should be good.
Art put two new sleeves in it and "updated" the porting a little bit to account for two improvements to the setup.
1. More compression. I went to custom 34cc domes for about 195-200psi compression. I'll be running 3:2 Avgas/Premium in it.

2. ATP Total Loss. Got a great deal from Wattage on an almost new system a few months ago.

I got everything back last Friday and reassembled over the weekend. I installed the engine tonight and hope to be breaking it in this weekend.
I still need to verify timing on the ignition just to be sure (Art's so anal, he looks out for bonehead me :biggrin
I need to put the tank back in and button everything up. But, it cranks, and it sparks.

Pic of engine:

 

[Motorheads5]

Oh That's nice Matt Congrat's you gonna ride this weekend we are all put away and cutting firewood lol The boys are working on the sled's now

 

[Matt_E]

Thanks Craiger, I am stoked to try it out.
Art sounded really excited about the upgrades and thinks it's really gonna rip now.
Like it didn't before. :biggrin:

Hummm.....I rode Mike's skis on Sunday, and I am hurting from that. I'm in for a beating.

 

[Motorheads5]

Cool heck you have been out of action for a while huh let us all know how that ignition work's out. You will love avgas dude way better than insence lol (spelling? lol)

 

[Matt_E]

Yep, last Sunday was the first time for me on the water since Surf Slam. Mike graciously invited me out on his skis. My finger's all better now.
Before I put my riding shoes on, I had to shake all the Pacific City sand out of them. :haha:

 

[swanny]

you got your engine all sent out and done before I even got my carbs on. you make me look and feel bad.

 

[Matt_E]

But my carnage trumps yours. So do the bills to pay for it.

 

[the WaTeRhAwK]

matt, where do you buy ATP total loss setups?

 

[Matt_E]

I bought mine from board member Wattage in Australia.
If you want to buy a new retail system, try ATP Queenford.

 

[RiverRat]

Nice!! How do you like those blackjacks?

 

[Matt_E]

They've been working flawlessly, very linear power, great off-idle response and absolutely no loading up.
Best carbs I've had yet. I've tried OEM 38's, Aftermarket 44's, single Riva Powerbomb, single 48 Full Spec, Dual 48 Full Specs, and single 46